FILE - In this Monday, Aug. 3, 2015, file photo, Republican presidential candidate and retired neurosurgeon Ben Carson speaks during a forum, in Manchester, N.H. Responding to a question during an interview broadcast Sunday, Sept. 20, 2015, on NBC's "Meet the Press," Carson, a devout Christian, said Islam is antithetical to the Constitution and he doesn’t believe that a Muslim should be elected president. (AP Photo/Jim Cole, File)
(The Associated Press)

Carson is a devout Christian and says a president's faith should matter to voters if it runs counter to America's values.

Responding to a question on NBC's "Meet the Press," Carson describes the Islamic faith as inconsistent with the Constitution.

He says he "absolutely would not agree" that "we put a Muslim in charge of this nation."

Carson's comments come amid fallout over Republican Donald Trump's refusal last week to take issue with a man during a campaign event who wrongly called President Barack Obama a Muslim and said Muslims are "a problem in this country." Obama is Christian.

Carson says he believes that Obama was born in the U.S. and is Christian.